General Specifications about Solar Sealant & Adhesive

Here is a comprehensive specification sheet for Solar Sealants & Adhesives, which are used to bond and seal components in photovoltaic (PV) modules, such as the junction box, frame, backsheet, and glass, ensuring long-term durability and weather resistance.

Parameter

Specification

Type

Silicone, Polyurethane (PU), Modified Silicone (MS), or Butyl-based

Application Areas

Junction box bonding, Frame sealing, Glass bonding, Backsheet lamination

Color

Black / White / Transparent / Grey

Viscosity

30,000 – 300,000 cP (depending on type; paste-like consistency)

Curing Type

Moisture-curing (RTV), UV-curing, or two-component (dual-cure)

Skin-over Time

5 – 30 minutes (at 25°C, 50% RH)

Full Cure Time

24 – 72 hours (varies by formulation and thickness)

Shore A Hardness

25 – 60 (Flexible to semi-rigid)

Elongation at Break

≥ 200% – 500% (high flexibility)

Tensile Strength

1.5 – 3.5 MPa (typical)

Adhesion Strength

Excellent adhesion to glass, aluminum, PET, and TPT

Dielectric Strength

> 20 kV/mm (essential for electrical insulation)

Volume Resistivity

≥ 1 × 10¹⁴ Ω·cm

Thermal Conductivity

~0.2 W/m·K (standard) – higher for thermal adhesives

Temperature Resistance

-40°C to +150°C (some up to +200°C intermittent)

UV Resistance

Excellent (especially in silicones and MS polymers)

Water Resistance

Excellent (suitable for outdoor and marine use)

Shelf Life

6 – 12 months (unopened, cool dry storage)

Packaging

300 ml cartridges, 600 ml sausages, bulk pails, or drums

Compliance Standards

UL 94-V0, IEC 61215, RoHS, REACH

Silicone Sealant for PV Modules (1527)

This high-quality, single-component, moisture-resistant, and flexible product is recommended for sealing the side frames of solar cells and solar lamps.

Product Technical Specifications

Rheology

Value

Condition/Method

Viscosity (cps @ 25℃)

White paste

—-

Density

Density (g/cm3）

1.37

—-

Curing

Flash Point (℃)

Cure Speed (Fixture/Full)

Operating Temperature Range (℃)

＞93

6min./24 hrs. (2mm)

-54 to 210

ISO3679, GB/T 5208-2008

Cured @ (23±2) ℃, (50±5) % RH

Cured Specifications: Cure speed will vary with temperature, relative humidity, depth of material and presence of moisture.

Cured Mechanical Properties

Measured on cured sheets ~2mm. Cured @ (23±2) ℃, (50 ± 5) % RH for 14 days, tested at (23±2) ℃.

Hardness (Shore A)

48

ISO7619, GB/T531

Elongation at break (%)

300

ISO37, GB/T528

Tensile Strength (MPa)

2.3

ISO37, GB/T528

Adhesion Strength (MPa)

1.8

ISO4587, GB/T7124

Damp-Heat aging properties (Damp-Heat aging at 85℃，85%RH for 1000h)

Electrical Properties

Volume resistivity (Ω.cm)

1.0×1015

IEC60093, GB/T1692

Breakdown tension (kv/mm）

20

IEC 60243-1, B/T16-95

Technology

Silicone

Type of Product

Adhesive

Components

One component

Curing

Moisture cure

Appearance / Color

Black

Consistency

Paste

Features and Benefits

– Super resistance to ultra violet (UV), rain, contamination and hail

– UL certificated

– Excellent thermal performance

– Excellent performance in insulation, thermal cycling, damp-heat, damp-freezing